ET HUNTING SUSPICIOUS .CPL File Inside of Zip

Query · suricata

flow:established,from_server;
file_data;
content:"PK|01 02|"; within:4;
content:".cpl"; nocase; fast_pattern; distance:42; within:500;
content:"PK|05 06|"; within:52;
content:"|01 00 01 00|"; distance:4; within:4;
Raw source ET HUNTING SUSPICIOUS .CPL File Inside of Zip · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING SUSPICIOUS .CPL File Inside of Zip";
    flow:established,from_server;
    file_data;
    content:"PK|01 02|"; within:4;
    content:".cpl"; nocase; fast_pattern; distance:42; within:500;
    content:"PK|05 06|"; within:52;
    content:"|01 00 01 00|"; distance:4; within:4;
    classtype:trojan-activity;
    sid:2018126; rev:3;
    metadata:created_at 2014_02_13, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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